I've dugout the supplys and going to test they still work ok today(sat) but just occured to me I believe these supplys have an internal fuse have you checked it's not just blown this fuse.?
Not 100% sure they have a fuse and looking thru case I can't see one but seem to recall Irving striping one and seeing a fuse.? But it's been a long time so could be wrong.!
Check the forum some where theres a thread about it.!